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These Tyvek&#174; envelopes provide superior puncture, tear and moisture protection. They are constructed from 14 lb. olefin. These envelopes are ten times stronger than paper envelopes. They feature a special seal that once broken, the word "OPENED" appears in red on the flap.

Tyvek&#174; Tamper Evident Security Envelopes, 12&quot;W x 9&quot;H, White, 100/Pack

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% on your purchase when you use your Global Industrial Credit Card.

 suggested payments with 6 month special financing OR 

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